Hook for double heddle bars



April 1946- F. w. HOLLINGS WORTH. JR Hook FOR DOUBLE HEDDLE BARS I Filed July 5, 1945 INVENTOR,

A TTORNE Y.

Iran/c W H012 z'z gsworrh?" I Patented Apr. 2, 1946 -z ,397,7ss

, 2,397,788 HOOK Foa DOUBLE HEDDLE BARS Frank W. Hollingsworth, Jr., Philadelphia, Pa., assignor to Walker Manufacturing Company, Inc., Philadelphia, Pa., a corporation of Pennsylvania Application July 5, 1943, Serial No. 493,620

2 Claims. (01.139-92) The object of the invention is to provide improvements in hooks for operatively supporting double, that is, pairs of closely adjacent heddle bars in loom frames, and, whereas there are hereinafter disclosed several embodiments of the invention, they are all characterized by the fact that both bars in each instance are released simultaneously. Such a pair of bars at the top of a frame cooperates with a lower pair in said frame to operatively support and alternatelyelevate and depress two sets of heddles simultaneously.

Another and more specific object is to provide a hook of this character, in which a pair of such bars are released from support by the hook by means of an upward, rectilinear motion of a single slidable element, which is normally maintained in its lowermost or locked position by means of a spring, which is preferably backed up by a lock nut, it being understood that references herein to lowermost and uppermost refer to the parts as viewed in the drawings, which in every case represent only the upper hooks of an oppositely disposed pair, carried respectively by the upper and lower shafts of the loom frame.

Another object is to provide a hook of this type, in which the slidable element is formed from an initial tubular member, pressed into proper shape by and between suitable dies.

A further object is to provide such a hook element by forming the same from an initially flat piece of sheet.

Still another object is to provide a hook in which two an ularly oscillatable elements are present, and which are maintained in either lowered. operative position, or in raised, inoperative position, by means of the same spring-pressed washer or the like, each of said elements in this form contacting both of the heddle bars when in lowered position.

A still further object is to provide a modifica tion of the last-mentioned type of hook, in which a pair of oscillatable elements are present, but in which each of said elements contacts only one of said bars, but that bar in two places simultaneously.

And a still further object is to provide a modi fled form in which two oscillatable elements, yieldingly positioned by a single spring, retain both bars of the pair normally in operative position, but which elements are automatically separated by a separate spring upon being released by said first spring.

With the objects thus briefly set forth, the

invention comprises further details of construc tion and operation, which are hereinafter fully described, when read in conjunction with the accompanying drawing, in which Fig. '1 is a. side.

elevation of one embodiment of the invention partly in sectionyFig. 2 is a front elevational view of the same; Fig. 3 is a section on the line 3-3 of Fig. 1; Fig. 4 is a side elevation of a modified form of the device; Fig 5 is a front elevation of the same; Fig. 6 is a section on the line 66 of Fig. 4; and Figs. 7, 8 and 9, respectively, front and'side elevational views of another modification.

In the drawing no complete heddle frame has been shown, as it is felt that the art involved is so well developed, that the position, use and function of the latches or hooks hereinafter described will be well understood.

Referring to Figs. 1, 2 and 3, the usual heddle frame is represented merely by a shaft l, which is in the position of the upper of the two shafts which go to make up the usual rectangular frame. This shaft is provided with one or more vertically extending bores 2, which in the two shafts of a frame must obviously be in alignment with each other. In this bore is positioned a threaded stud 3 of a shank 4 of a heddle bar supporting member, having 2. depending, transversely enlarged head 5, which provides oppositely directed shoulders 6 for operatively supporting a pair of spaced parallel heddle bars I.

The stud 3 is shown in this case as being adjustably positioned longitudinally within the bore 2 by means of a knurled nut 8, which upon being rotated tends to elevate or depress said stud and thereby place the desired tension upon the heddle supported by and between the heddle bars. Supported by each pair of oppositely positioned hooks, the finally adjusted position of each such heddle bar is secured by means of a lock nut 9 upon each hook stud, said lock nuts binding the under or adjacent surfaces of the shaft l.

Slidable longitudinally upon the shank 4 is a retaining element l0, having a pair of parallel arms I I, slidably positioned upon and closely adjacent to the opposite sides of said shank, each of said arms being provided with an angular cut-out portion I2, which receives the heddle bars I and together with said shank and its enlarged head 5 normally secure said bars firmly in fixed position. Against the upper surface of said bar presses a preferably conical spiral spring l3. which surrounds the stud 3 and is adjustably tensioned by an outwardly knurled nut H, which, if provided upon its lower side with an axial recess will receive the outer end of said spring and permit said nut to jam tight against the upper surface of element [0, tho the actual contact between said nut and said upper surface is not essential to the operation of the device.

In order to release said bars for the adjustment or replacement of heddles upon them, it

is only necessary toraise the nut 14, to release I the tension exerted thereby upon spring [3, and

then manually raise the retaining element l0,

frbm a slight difference in construction, the operation of this form of hook is exactly similar to that of the form first described.

whereupon said bars are immediately shifted laterally outwardly, heddles slidably adjusted; upon each of side bars independently, and the bars then returned to their normal positions, as shown" in the drawing, following which thespring I3 returns said element to its lowermost'operative position, and the desired tension is placed upon said spring by adjustment of the nut M; Then,

taining ,fingers which may but need not, be

curved slightly outwardly at their tip end portions, as indicated "in Fig. '7, in order, if desized. to facilitatethe entrance of the bars beif desirable, the tension upon the heddles supported by said bars may be readjusted by loosening the lock nut 9, readjusting the nut 8 an tightening said lock nut.

Referring to Figs. 4, 5 and 6, the shaft l in this instance is similarly provided with a bore 2, in which is positioned the threaded stud '3 of a hook or latch, the position of-said stud being adjustably secured by means of a locknut 4, if desired. This construction is shown asbeing different from that inFigs. 1 and 2 merely to illustrate the fact that the'invention is inno way dependent upon any existing'method of securing the hook'or latch to the respective frame shafts. In this form of the device said stud is provided with a shank I5, an enlarged terminal head portion I5, which provides shoulders l6 uponwhichrest a pair of spaced'hedd-le bars I. 7

Above and spaced from said bars said shank is preferably provided also with lateral enlargements 11, which; together serve as a guide for the element l8, which is preferably pressed from an initial tube into a cross section closely resembling that shown in-Fig. 6, and thereby provides oppositely projecting, manually engageable portions- 18. of recesses I 9 for the reception of said bars, while said bars are retained in operative position upon shoulders l6 byparallel fingers 20, comprising eX-. tensions of said element spaced from its central portion. as indicated in Fig. ,4. As in the con-,

struction shown in Figs. 1-3, the bar-retaining. element l8 urged into its normal: lower posi-. tion by a means. of. a .conical spiral spring 2 l adjustably tensioned bya knurled nut or the like 22, as in the form heretofore described. Aside Said element is also cut to provide apair tween them, as said element is permitted to descend into operative position under the influrence of -'the conical-spiral spring '21 and-nut 22,

the latter of which is adjustably carried by the; threaded stud 3. a

Havingthus. described my invention, what I claim and desire to protect by Letters Patent of;

' the United-States is:

l. The combination of a pair of heddle bars; with a hook comprising a-member to support and separate said bars,- and an upwardly'anddownwardly movable element having recesses to;- receive and normally secure said bars in fixed; operative position, said element comprising asubstantially rectangular tube surrounding. said member and provided with oppositely positioned divergent fingers operative to extend upon the" opposite sides of and retain said bars in opera-1 tive position with respect to said member.

2. The combination of a pair of heddle bars; with a hook comprising a member to support and separate said bars, and an upwardlyanddown wardly movable element having recesses to receive and normally secure saidbars in fixed operto extend upon the .vopposite sides'of and-=guide said bars'into operative position withrespect tosaid member, a spring, and an adjustable ,nut carried. by said first member to normally maine-jtain saidelement in fixed bar-engaging position.

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